/* ===== ITCA INSTITUTE — Hoja de estilos ===== */
:root{
  --steel:#15191f;
  --steel-2:#1d232b;
  --steel-3:#262d36;
  --gold:#f5b50a;
  --gold-2:#ffd34d;
  --blue:#2f7fe0;
  --red:#e0382b;
  --light:#f4f6f8;
  --muted:#9aa6b2;
  --text:#e8edf2;
  --radius:14px;
  --shadow:0 18px 40px rgba(0,0,0,.35);
  --max:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--steel);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(var(--max),92%);margin:0 auto}

h1,h2,h3,h4,.brand-text{font-family:'Oswald',sans-serif;font-weight:600;letter-spacing:.5px;line-height:1.15}

/* ===== Botones ===== */
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.85rem 1.6rem;border-radius:50px;font-weight:600;
  font-size:1rem;cursor:pointer;border:2px solid transparent;
  transition:transform .15s ease,box-shadow .2s ease,background .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1305;box-shadow:0 8px 22px rgba(245,181,10,.35)}
.btn-outline{border-color:rgba(255,255,255,.4);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.1)}
.btn-sm{padding:.5rem 1.1rem;font-size:.9rem}
.btn-block{width:100%;justify-content:center}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(21,25,31,.85);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:background .3s ease;
}
.site-header.scrolled{background:rgba(21,25,31,.97)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:.6rem}
.brand-logo{height:48px;width:auto}
.brand-text{display:flex;align-items:baseline;gap:.35rem;font-size:1.5rem;color:#fff;letter-spacing:1px}
.brand-text small{font-size:.85rem;color:var(--gold);font-weight:500}
.nav{display:flex;align-items:center;gap:1.5rem}
.nav a{font-size:.95rem;color:var(--text);font-weight:500;transition:color .2s}
.nav a:hover{color:var(--gold-2)}
.nav a.btn{color:#1a1305}
.lang-toggle{
  display:inline-flex;align-items:center;gap:.4rem;background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.18);color:#fff;cursor:pointer;
  padding:.45rem .85rem;border-radius:50px;font-size:.85rem;font-weight:600;font-family:inherit;transition:.2s;
}
.lang-toggle:hover{background:rgba(245,181,10,.2);border-color:var(--gold)}
.lang-toggle i{color:var(--gold-2)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:26px;height:3px;background:#fff;border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:120px 0 60px;
  background:
    radial-gradient(circle at 15% 30%,rgba(224,56,43,.35),transparent 45%),
    radial-gradient(circle at 85% 70%,rgba(47,127,224,.4),transparent 45%),
    linear-gradient(160deg,#11151a 0%,#1d232b 60%,#11151a 100%);
}
.hero-overlay{position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath d='M0 39h40M39 0v40' stroke='%23ffffff0d' stroke-width='1'/%3E%3C/svg%3E");opacity:.5}
.hero-inner{position:relative;max-width:820px}
.badge-years{
  display:inline-flex;align-items:center;gap:.5rem;
  background:rgba(245,181,10,.15);color:var(--gold-2);
  border:1px solid rgba(245,181,10,.4);
  padding:.45rem 1rem;border-radius:50px;font-weight:600;font-size:.9rem;margin-bottom:1.4rem;
}
.hero h1{font-size:clamp(2.2rem,5vw,3.7rem);color:#fff;margin-bottom:1.2rem}
.hero h1 .hl{color:var(--gold-2)}
.hero-sub{font-size:1.15rem;color:#cdd6df;max-width:680px;margin-bottom:2rem}
.hero-cta{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:3rem}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;max-width:720px}
.stat{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:1.1rem;text-align:center}
.stat .num{display:block;font-family:'Oswald',sans-serif;font-size:1.9rem;color:var(--gold-2);font-weight:700}
.stat .lbl{font-size:.82rem;color:var(--muted)}

/* ===== Secciones ===== */
.section{padding:90px 0}
.section-dark{background:var(--steel-2)}
.section-head{text-align:center;max-width:720px;margin:0 auto 3rem}
.eyebrow{color:var(--gold);font-weight:600;text-transform:uppercase;letter-spacing:2px;font-size:.85rem}
.section-head h2{font-size:clamp(1.8rem,3.5vw,2.6rem);color:#fff;margin:.6rem 0 1rem}
.section-head p{color:var(--muted)}

.grid{display:grid;gap:1.5rem}
.grid-3{grid-template-columns:repeat(3,1fr)}

/* Cards (por qué) */
.card{
  background:var(--steel-3);border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius);padding:2rem 1.6rem;transition:transform .2s,border-color .2s;
}
.card:hover{transform:translateY(-5px);border-color:rgba(245,181,10,.4)}
.icon-gold{font-size:2.2rem;color:var(--gold);margin-bottom:1rem}
.card h3{font-size:1.25rem;color:#fff;margin-bottom:.5rem}
.card p{color:var(--muted);font-size:.95rem}

/* Programas */
.program{
  background:linear-gradient(160deg,var(--steel-3),#1a2027);
  border:1px solid rgba(255,255,255,.06);border-radius:var(--radius);
  padding:1.8rem;transition:transform .2s,box-shadow .2s;position:relative;overflow:hidden;
}
.program:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.program::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--gold),var(--blue))}
.program-ico{
  width:60px;height:60px;border-radius:14px;display:grid;place-items:center;
  background:rgba(245,181,10,.12);color:var(--gold-2);font-size:1.6rem;margin-bottom:1.1rem;
}
.program h3{font-size:1.15rem;color:#fff;margin-bottom:.5rem}
.program p{color:var(--muted);font-size:.93rem}
.center-cta{text-align:center;margin-top:2.5rem}

/* Certificaciones */
.cert-grid{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}
.cert{
  display:inline-flex;align-items:center;gap:.6rem;
  background:var(--steel-3);border:1px solid rgba(245,181,10,.25);
  color:var(--text);padding:.85rem 1.4rem;border-radius:50px;font-weight:600;font-size:.95rem;
  transition:transform .15s,background .2s;
}
.cert i{color:var(--gold)}
.cert:hover{transform:translateY(-3px);background:#2c343e}

/* Instructor */
.instructor-wrap{display:grid;grid-template-columns:0.9fr 1.1fr;gap:3rem;align-items:center}
.instructor-photo{
  position:relative;border-radius:var(--radius);overflow:hidden;min-height:420px;
  background:linear-gradient(160deg,#222a33,#161b21);border:1px solid rgba(255,255,255,.07);
  display:grid;place-items:center;
}
.instructor-photo img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.photo-fallback{display:none;flex-direction:column;align-items:center;gap:.6rem;color:var(--muted)}
.photo-fallback i{font-size:3.5rem;color:var(--gold)}
.instructor-photo.no-photo .photo-fallback{display:flex}
.instructor-text .eyebrow{display:block}
.instructor-text h2{font-size:clamp(1.7rem,3vw,2.4rem);color:#fff;margin:.5rem 0 1rem}
.instructor-text>p{color:#c7d0d9;margin-bottom:1.4rem}
.check-list{list-style:none;display:grid;gap:.7rem}
.check-list li{display:flex;gap:.7rem;color:#d3dae1;font-size:.97rem}
.check-list i{color:var(--gold);margin-top:.25rem;flex-shrink:0}

/* Testimonios */
.testimonial{
  background:var(--steel-3);border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius);padding:2rem;position:relative;
}
.testimonial .stars{color:var(--gold);margin-bottom:.9rem;letter-spacing:2px}
.testimonial p{color:#dbe2e9;font-style:italic;margin-bottom:1rem}
.testimonial footer{color:var(--gold-2);font-weight:600}
.testimonial footer small{color:var(--muted);font-weight:400}

/* Videos de testimonios */
.video-head{text-align:center;margin:3rem 0 1.5rem}
.video-head h3{color:#fff;font-size:1.6rem}
.video-head p{color:var(--muted);font-size:.92rem}
.video-grid{margin-top:1rem}
.video-card{border-radius:var(--radius);overflow:hidden;border:1px solid rgba(255,255,255,.08);background:var(--steel-3);aspect-ratio:16/9}
.video-card iframe{width:100%;height:100%;border:0;display:block}
.video-ph{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;color:var(--muted)}
.video-ph i{font-size:2.6rem;color:#ff0033}
.video-ph span{font-size:.88rem}

/* Galería */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}
.gtile{
  aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden;position:relative;
  background:linear-gradient(160deg,#2a323c,#171c22);
  border:1px solid rgba(255,255,255,.06);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;
  color:var(--muted);text-align:center;padding:1rem;transition:transform .2s;
  background-size:cover;background-position:center;
}
.gtile:hover{transform:scale(1.03)}
.gtile i{font-size:2rem;color:var(--gold)}
.gtile span{font-size:.85rem;font-weight:500}
.gtile.has-img i,.gtile.has-img span{display:none}
.gallery-note{text-align:center;color:var(--muted);font-size:.85rem;margin-top:1.2rem}
.gallery-note code{background:rgba(255,255,255,.08);padding:.15rem .45rem;border-radius:5px;color:var(--gold-2)}

/* Contacto */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem}
.ci-item{display:flex;gap:1rem;margin-bottom:1.4rem;align-items:flex-start}
.ci-item i{font-size:1.3rem;color:var(--gold);width:36px;height:36px;display:grid;place-items:center;background:rgba(245,181,10,.12);border-radius:10px;flex-shrink:0}
.ci-item a{color:var(--gold-2)}
.map{margin-top:1rem;border-radius:var(--radius);overflow:hidden;border:1px solid rgba(255,255,255,.1)}
.map iframe{width:100%;height:260px;border:0;display:block;filter:grayscale(.2)}
.contact-form{background:var(--steel-3);border:1px solid rgba(255,255,255,.07);border-radius:var(--radius);padding:2rem}
.contact-form h3{color:#fff;font-size:1.4rem;margin-bottom:.3rem}
.form-help{color:var(--muted);font-size:.88rem;margin-bottom:1.2rem}
.contact-form label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:1rem;font-weight:500}
.contact-form input,.contact-form select,.contact-form textarea{
  width:100%;margin-top:.35rem;padding:.8rem 1rem;border-radius:10px;
  background:#10151b;border:1px solid rgba(255,255,255,.12);color:#fff;font-family:inherit;font-size:.95rem;
}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--gold)}

/* Footer */
.site-footer{background:#0f1318;border-top:1px solid rgba(255,255,255,.07);padding-top:3rem}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem;padding-bottom:2.5rem}
.footer-brand .brand-text{font-size:1.6rem;color:#fff}
.footer-brand p{color:var(--muted);margin-top:.7rem;font-size:.9rem;max-width:340px}
.footer-col h4{color:#fff;margin-bottom:1rem;font-size:1rem}
.footer-col a,.footer-col p{display:block;color:var(--muted);font-size:.9rem;margin-bottom:.5rem}
.footer-col a:hover{color:var(--gold-2)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.07);padding:1.2rem 0;color:var(--muted);font-size:.85rem;text-align:center}

/* WhatsApp flotante */
.wa-float{
  position:fixed;right:20px;bottom:20px;z-index:90;
  width:58px;height:58px;border-radius:50%;background:#25d366;color:#fff;
  display:grid;place-items:center;font-size:1.8rem;box-shadow:0 8px 24px rgba(37,211,102,.45);
  transition:transform .2s;
}
.wa-float:hover{transform:scale(1.1)}

/* Animación reveal */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ===== Responsive ===== */
@media(max-width:900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .instructor-wrap{grid-template-columns:1fr}
  .instructor-photo{min-height:320px}
  .contact-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .nav{
    position:fixed;top:72px;right:0;width:75%;height:calc(100vh - 72px);
    flex-direction:column;align-items:flex-start;gap:1.2rem;
    background:#11151a;padding:2rem 1.6rem;transform:translateX(100%);transition:transform .3s;border-left:1px solid rgba(255,255,255,.08);
  }
  .nav.open{transform:translateX(0)}
  .nav-toggle{display:flex}
  .nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .grid-3{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .hero{min-height:auto}
}